custom routing controller

A dedicated control loop that automates traffic distribution by synchronizing custom API resources with live load balancer configurations.

Custom routing controllers manage the bridge between external traffic and internal microservices by executing logic defined in Custom Resource Definitions (CRDs). These controllers watch the Kubernetes API and update data plane providers (like Envoy or NGINX) whenever service states change. Use them to implement 10% canary rollouts, path-based routing for API versioning (v1 vs. v2), and automated TLS certificate rotation via Cert-Manager. This programmatic approach ensures sub-second updates to routing tables: maintaining high availability for high-traffic environments without manual configuration overhead.

https://gateway-api.sigs.k8s.io/